Properties of Portland Cement Pastes Incorporating Nanometer‐Sized Franklinite Particles Obtained from Electric‐Arc‐Furnace Dust

Abstract

The present work presents preliminary results concerning ordinary portland cement (OPC) blended with electric‐arc‐furnace dust (EAFD) obtained from steel‐smelting plants. The powder obtained after acid treatment of the EAFD consisted basically of nanometer‐sized particles of ZnFe 2 O 4 . Incorporation of the EAFD in the OPC produced retardation of the setting process. Nevertheless, after 7 d, the compressive strength of the OPC/EAFD pastes was superior to undoped OPC, and, after 28 d, the extent of hydration of the OPC/EAFD pastes was equivalent to undoped OPC. A compressive strength of 72 MPa was attained after 42 d for OPC doped with 10 wt% EAFD.